Electric-field control of ferromagnetism through oxygen ion gating

Hao-Bo Li, Nianpeng Lu, Qinghua Zhang, Yujia Wang, Deqiang Feng, Tianzhe Chen, Shuzhen Yang, Zheng Duan, Zhuolu Li, Yujun Shi, Weichao Wang, Wei-Hua Wang, Kui Jin, Hui Liu, Jing Ma, Lin Gu, Cewen Nan and Pu Yu ()
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Hao-Bo Li: Tsinghua University
Nianpeng Lu: Tsinghua University
Qinghua Zhang: Chinese Academy of Science
Yujia Wang: Tsinghua University
Deqiang Feng: Nankai University
Tianzhe Chen: Tsinghua University
Shuzhen Yang: Tsinghua University
Zheng Duan: Tsinghua University
Zhuolu Li: Tsinghua University
Yujun Shi: Chinese Academy of Science
Weichao Wang: Nankai University
Wei-Hua Wang: Nankai University
Kui Jin: Chinese Academy of Science
Hui Liu: Nankai University
Jing Ma: School of Materials Science and Engineering, Tsinghua University
Lin Gu: Chinese Academy of Science
Cewen Nan: School of Materials Science and Engineering, Tsinghua University
Pu Yu: Tsinghua University

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Electric-field-driven oxygen ion evolution in the metal/oxide heterostructures emerges as an effective approach to achieve the electric-field control of ferromagnetism. However, the involved redox reaction of the metal layer typically requires extended operation time and elevated temperature condition, which greatly hinders its practical applications. Here, we achieve reversible sub-millisecond and room-temperature electric-field control of ferromagnetism in the Co layer of a Co/SrCoO2.5 system accompanied by bipolar resistance switching. In contrast to the previously reported redox reaction scenario, the oxygen ion evolution occurs only within the SrCoO2.5 layer, which serves as an oxygen ion gating layer, leading to modulation of the interfacial oxygen stoichiometry and magnetic state. This work identifies a simple and effective pathway to realize the electric-field control of ferromagnetism at room temperature, and may lead to applications that take advantage of both the resistance switching and magnetoelectric coupling.

Date: 2017
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DOI: 10.1038/s41467-017-02359-6

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